CVE-2021-3671
Samba Null Pointer Dereference Vulnerability
Description
A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.
INFO
Published Date :
Oct. 12, 2021, 6:15 p.m.
Last Modified :
Nov. 7, 2023, 3:38 a.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
3.6
Exploitability Score :
2.8
Public PoC/Exploit Available at Github
CVE-2021-3671 has a 3 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
Affected Products
The following products are affected by CVE-2021-3671
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-3671.
| URL | Resource |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C | |
| https://bugzilla.samba.org/show_bug.cgi?id=14770%2C | |
| https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a | Patch Third Party Advisory |
| https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html | Mailing List Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20221215-0002/ | Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20230216-0008/ | Third Party Advisory |
| https://www.debian.org/security/2022/dsa-5287 | Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Java Shell
Random late night exercises
Dockerfile Shell Python HCL
None
Shell Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-3671 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-3671 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
CVE Modified by [email protected]
Nov. 07, 2023
Action Type Old Value New Value Added Reference Red Hat, Inc. https://bugzilla.redhat.com/show_bug.cgi?id=2013080%2C [No types assigned] Added Reference Red Hat, Inc. https://bugzilla.samba.org/show_bug.cgi?id=14770%2C [No types assigned] Removed Reference Red Hat, Inc. https://bugzilla.samba.org/show_bug.cgi?id=14770, Removed Reference Red Hat, Inc. https://bugzilla.redhat.com/show_bug.cgi?id=2013080, -
Modified Analysis by [email protected]
Feb. 24, 2023
Action Type Old Value New Value Changed Reference Type https://security.netapp.com/advisory/ntap-20221215-0002/ No Types Assigned https://security.netapp.com/advisory/ntap-20221215-0002/ Third Party Advisory Changed Reference Type https://security.netapp.com/advisory/ntap-20230216-0008/ No Types Assigned https://security.netapp.com/advisory/ntap-20230216-0008/ Third Party Advisory Added CWE NIST CWE-476 Added CPE Configuration OR *cpe:2.3:a:netapp:management_services_for_element_software:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:management_services_for_netapp_hci:-:*:*:*:*:*:*:* *cpe:2.3:a:netapp:ontap_select_deploy_administration_utility:-:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Feb. 16, 2023
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20230216-0008/ [No Types Assigned] -
CVE Modified by [email protected]
Dec. 15, 2022
Action Type Old Value New Value Added Reference https://security.netapp.com/advisory/ntap-20221215-0002/ [No Types Assigned] -
Modified Analysis by [email protected]
Nov. 29, 2022
Action Type Old Value New Value Changed Reference Type https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html No Types Assigned https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html Mailing List, Third Party Advisory Changed Reference Type https://www.debian.org/security/2022/dsa-5287 No Types Assigned https://www.debian.org/security/2022/dsa-5287 Third Party Advisory Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:* -
CVE Modified by [email protected]
Nov. 26, 2022
Action Type Old Value New Value Added Reference https://lists.debian.org/debian-lts-announce/2022/11/msg00034.html [No Types Assigned] -
CVE Modified by [email protected]
Nov. 23, 2022
Action Type Old Value New Value Added Reference https://www.debian.org/security/2022/dsa-5287 [No Types Assigned] -
Initial Analysis by [email protected]
Oct. 19, 2021
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:S/C:N/I:N/A:P) Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=2013080, No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=2013080, Broken Link, Issue Tracking Changed Reference Type https://bugzilla.samba.org/show_bug.cgi?id=14770, No Types Assigned https://bugzilla.samba.org/show_bug.cgi?id=14770, Broken Link, Issue Tracking Changed Reference Type https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a No Types Assigned https://github.com/heimdal/heimdal/commit/04171147948d0a3636bc6374181926f0fb2ec83a Patch, Third Party Advisory Added CPE Configuration OR *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions up to (excluding) 4.13.12 *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.14.0 up to (excluding) 4.14.8
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-3671 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-3671
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.52 }} 0.16%
score
0.74404
percentile